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#871
Is this a laptop or desktop computer? If it's a laptop, you'll need to go to the manufacturer and get the video card drivers. If it's a PC, you should be able to go here - Graphics Drivers & Software, find the drivers you need and update.
It would also help you, as well as us if you gave us a little more info??? What version of Windows 7 32 or 64-bit? What video card do you have? 4200 says 4000 series. Which card in the 4000 series range? Example 4850?
Thanks